MAX251CSD+

Overview

The MAX251CSD+ is an RS-232 driver and receiver component designed for use with the MAX250 to form a complete isolated interface system. Operating from a single +5V supply, it provides dual drivers and dual receivers for bidirectional data communication. The device handles RS-232 voltage level translation between logic signals and serial port requirements. It supports data rates up to 19.2 kbaud and includes output enable controls for tri-state operation. The component utilizes a 16-pin SOIC package.

Feature Summary

• Provides dual RS-232 drivers and dual receivers for full duplex communication
• Operates from a single +5V power supply
• Includes output enable pins for controlled tri-state bus isolation

Applications

• Isolated RS-232 data communication links
• Industrial control systems requiring electrical isolation
• Modem interfaces in noisy environments

Procurement Notes

Verify the specific suffix 'CSD+' against the manufacturer's current documentation to confirm the package type and temperature range. Ensure compatibility with the paired MAX250 controller chip for the intended isolated interface design. Confirm availability status directly with authorized distributors as lead times may vary.

Selection Notes

Select this component when designing an isolated RS-232 interface that requires a dedicated driver/receiver stage paired with a logic controller. It is suitable for applications needing galvanic isolation via external optocouplers and transformers. Verify that the required data rate does not exceed 19.2 kbaud and that the system architecture accommodates the necessary external passive components.

Part Context

The MAX251CSD+ functions as part of the MAX250/MAX251 chipset, where the MAX250 manages logic and optocoupler interfacing while the MAX251 handles RS-232 signal levels. This pairing simplifies the design of electrically isolated serial ports by reducing the number of discrete components required for transformer driving and signal conditioning.

Replacement Considerations

Direct replacements within the same family include other variants of the MAX251 series. Verify pinout compatibility and electrical specifications before substituting with other isolated RS-232 transceivers.